Date: Wed, 31 Jul 2024 07:31:02 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 276961] buildworld artifacts not reproducible between native and cross build Message-ID: <bug-276961-227-OCrw5XTgvq@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-276961-227@https.bugs.freebsd.org/bugzilla/> References: <bug-276961-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D276961 --- Comment #19 from commit-hook@FreeBSD.org --- A commit in branch stable/14 references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=3D96ff33484ee5f44bc3ac743ce235d2349= 5465904 commit 96ff33484ee5f44bc3ac743ce235d23495465904 Author: Dimitry Andric <dim@FreeBSD.org> AuthorDate: 2024-07-28 11:13:37 +0000 Commit: Dimitry Andric <dim@FreeBSD.org> CommitDate: 2024-07-31 07:29:47 +0000 Merge commit c80c09f3e380 from llvm-project (by Dimitry Andric): [CalcSpillWeights] Avoid x87 excess precision influencing weight resu= lt Fixes #99396 The result of `VirtRegAuxInfo::weightCalcHelper` can be influenced by x87 excess precision, which can result in slightly different register choices when the compiler is hosted on x86_64 or i386. This leads to different object file output when cross-compiling to i386, or native. Similar to 7af3432e22b0, we need to add a `volatile` qualifier to the local `Weight` variable to force it onto the stack, and avoid the exc= ess precision. Define `stack_float_t` in `MathExtras.h` for this purpose, and use it. This is the version of the fix for PR276961 that landed upstream. PR: 276961 Reported by: cperciva MFC after: 3 days (cherry picked from commit 1a4b8325f6e3a45c77188343da504fe04495cc46) contrib/llvm-project/llvm/include/llvm/Support/MathExtras.h | 8 ++++++++ contrib/llvm-project/llvm/lib/CodeGen/CalcSpillWeights.cpp | 11 ++++++---= -- 2 files changed, 14 insertions(+), 5 deletions(-) --=20 You are receiving this mail because: You are the assignee for the bug.=
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